I am pointed to this Japanese forum, and informed that it is about a petition to urge Japanese government to legitimize virtual marriage, not a common kind you may guess. It is a union between real world people with a 2D Manga/Animated character.
I can’t read Japanese Kanji, hence no way I can confirm this. The number on the right increases by 5-10 each day. My question is, will Japan government pass the law if this amasses enough number? Like, say ten thousand.
(Link) Project 213, Shomei.tv, petition to allow marriage with 2D character in Japan.